SIM 1 Mobile Data Problem

ZF Model: ZE554KL
Firmware/APP Version: *
Frequency of Occurrence: *
Rooted: No
APP Name:

I can't use SIM 1 slot for mobile data. SIM 2 works fine though. Please help.


  • Hi zenfans_ZV8P

    Please help to confirm your model.
    What's your phone’s firmware version (Settings > About > Software information > Build number)
    Please try to use other different sim card for a check, also check the SIM tray
    Please verify it in safe mode. (

    Thank you:)
  • Build Number: OPM1.WW_Phone-15.2016.1901.156-20190126
    I already tried swapping the sim cards and it's still a no go.
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